577 lines
15 KiB
C
577 lines
15 KiB
C
/*
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* File : cdc_vcom.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2012-10-02 Yi Qiu first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rthw.h>
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#include "cdc.h"
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#ifdef RT_USB_DEVICE_CDC
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static uclass_t cdc;
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static uep_t ep_in, ep_out, ep_cmd;
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#define CDC_RX_BUFSIZE 64
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#define CDC_TX_BUFSIZE 2048
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static rt_uint8_t rx_pool[CDC_RX_BUFSIZE];
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static rt_uint8_t tx_pool[CDC_TX_BUFSIZE];
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static struct rt_ringbuffer rx_ringbuffer;
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static struct rt_ringbuffer tx_ringbuffer;
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static struct rt_serial_device vcom_serial;
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static struct serial_ringbuffer vcom_int_rx;
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static rt_bool_t vcom_connected = RT_FALSE;
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static struct udevice_descriptor dev_desc =
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{
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USB_DESC_LENGTH_DEVICE, //bLength;
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USB_DESC_TYPE_DEVICE, //type;
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USB_BCD_VERSION, //bcdUSB;
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USB_CLASS_CDC, //bDeviceClass;
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0x00, //bDeviceSubClass;
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0x00, //bDeviceProtocol;
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0x40, //bMaxPacketSize0;
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USB_VENDOR_ID, //idVendor;
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USB_CDC_PRODUCT_ID, //idProduct;
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USB_BCD_DEVICE, //bcdDevice;
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USB_STRING_MANU_INDEX, //iManufacturer;
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USB_STRING_PRODUCT_INDEX, //iProduct;
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USB_STRING_SERIAL_INDEX, //iSerialNumber;
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USB_DYNAMIC, //bNumConfigurations;
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};
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#ifdef RT_USB_DEVICE_COMPOSITE
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static struct uiad_descriptor iad_desc =
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{
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USB_DESC_LENGTH_IAD,
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USB_DESC_TYPE_IAD,
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USB_DYNAMIC,
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0x02,
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USB_CDC_CLASS_COMM,
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USB_CDC_SUBCLASS_ACM,
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USB_CDC_PROTOCOL_V25TER,
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0x00,
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};
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#endif
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/* communcation interface descriptor */
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static struct ucdc_comm_descriptor comm_desc =
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{
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/* Interface Descriptor */
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USB_DESC_LENGTH_INTERFACE,
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USB_DESC_TYPE_INTERFACE,
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USB_DYNAMIC,
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0x00,
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0x01,
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USB_CDC_CLASS_COMM,
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USB_CDC_SUBCLASS_ACM,
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USB_CDC_PROTOCOL_V25TER,
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0x00,
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/* Header Functional Descriptor */
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0x05,
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USB_CDC_CS_INTERFACE,
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USB_CDC_SCS_HEADER,
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0x0110,
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/* Call Management Functional Descriptor */
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0x05,
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USB_CDC_CS_INTERFACE,
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USB_CDC_SCS_CALL_MGMT,
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0x00,
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USB_DYNAMIC,
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/* Abstract Control Management Functional Descriptor */
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0x04,
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USB_CDC_CS_INTERFACE,
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USB_CDC_SCS_ACM,
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0x02,
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/* Union Functional Descriptor */
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0x05,
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USB_CDC_CS_INTERFACE,
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USB_CDC_SCS_UNION,
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USB_DYNAMIC,
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USB_DYNAMIC,
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/* Endpoint Descriptor */
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USB_DESC_LENGTH_ENDPOINT,
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USB_DESC_TYPE_ENDPOINT,
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USB_DYNAMIC | USB_DIR_IN,
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USB_EP_ATTR_INT,
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0x08,
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0xFF,
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};
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/* data interface descriptor */
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static struct ucdc_data_descriptor data_desc =
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{
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/* interface descriptor */
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USB_DESC_LENGTH_INTERFACE,
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USB_DESC_TYPE_INTERFACE,
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USB_DYNAMIC,
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0x00,
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0x02,
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USB_CDC_CLASS_DATA,
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0x00,
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0x00,
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0x00,
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/* endpoint, bulk out */
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USB_DESC_LENGTH_ENDPOINT,
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USB_DESC_TYPE_ENDPOINT,
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USB_DYNAMIC | USB_DIR_OUT,
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USB_EP_ATTR_BULK,
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USB_CDC_BUFSIZE,
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0x00,
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/* endpoint, bulk in */
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USB_DESC_LENGTH_ENDPOINT,
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USB_DESC_TYPE_ENDPOINT,
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USB_DYNAMIC | USB_DIR_IN,
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USB_EP_ATTR_BULK,
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USB_CDC_BUFSIZE,
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0x00,
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};
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/**
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* This function will handle cdc bulk in endpoint request.
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*
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* @param device the usb device object.
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* @param size request size.
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*
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* @return RT_EOK.
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*/
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static rt_err_t _ep_in_handler(udevice_t device, rt_size_t size)
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{
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rt_uint32_t level;
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rt_size_t length;
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rt_size_t mps = ep_in->ep_desc->wMaxPacketSize;
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size = RT_RINGBUFFER_SIZE(&tx_ringbuffer);
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if(size == 0) return RT_EOK;
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length = size > mps ? mps : size;
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level = rt_hw_interrupt_disable();
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rt_ringbuffer_get(&tx_ringbuffer, ep_in->buffer, length);
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rt_hw_interrupt_enable(level);
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/* send data to host */
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dcd_ep_write(device->dcd, ep_in, ep_in->buffer, length);
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return RT_EOK;
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}
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/**
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* This function will handle cdc bulk out endpoint request.
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*
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* @param device the usb device object.
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* @param size request size.
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*
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* @return RT_EOK.
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*/
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static rt_err_t _ep_out_handler(udevice_t device, rt_size_t size)
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{
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rt_uint32_t level;
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RT_ASSERT(device != RT_NULL);
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/* receive data from USB VCOM */
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level = rt_hw_interrupt_disable();
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rt_ringbuffer_put(&rx_ringbuffer, ep_out->buffer, size);
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rt_hw_interrupt_enable(level);
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/* notify receive data */
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rt_hw_serial_isr(&vcom_serial);
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dcd_ep_read(device->dcd, ep_out, ep_out->buffer,
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ep_out->ep_desc->wMaxPacketSize);
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return RT_EOK;
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}
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/**
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* This function will handle cdc interrupt in endpoint request.
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*
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* @param device the usb device object.
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* @param size request size.
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*
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* @return RT_EOK.
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*/
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static rt_err_t _ep_cmd_handler(udevice_t device, rt_size_t size)
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{
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RT_ASSERT(device != RT_NULL);
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RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_cmd_handler\n"));
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return RT_EOK;
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}
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/**
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* This function will handle cdc_get_line_coding request.
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*
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* @param device the usb device object.
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* @param setup the setup request.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _cdc_get_line_coding(udevice_t device, ureq_t setup)
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{
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struct ucdc_line_coding data;
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rt_uint16_t size;
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(setup != RT_NULL);
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data.dwDTERate = 115200;
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data.bCharFormat = 0;
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data.bDataBits = 8;
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data.bParityType = 0;
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size = setup->length > 7 ? 7 : setup->length;
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dcd_ep_write(device->dcd, 0, (void*)&data, size);
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return RT_EOK;
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}
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/**
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* This function will handle cdc_set_line_coding request.
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*
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* @param device the usb device object.
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* @param setup the setup request.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _cdc_set_line_coding(udevice_t device, ureq_t setup)
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{
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struct ucdc_line_coding data;
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rt_err_t ret;
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(setup != RT_NULL);
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rt_completion_init(&device->dcd->completion);
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dcd_ep_read(device->dcd, 0, (void*)&data, setup->length);
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ret = rt_completion_wait(&device->dcd->completion, 100);
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if(ret != RT_EOK)
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{
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rt_kprintf("_cdc_set_line_coding timeout\n");
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}
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return RT_EOK;
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}
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/**
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* This function will handle cdc interface request.
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*
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* @param device the usb device object.
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* @param setup the setup request.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _interface_handler(udevice_t device, ureq_t setup)
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{
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(setup != RT_NULL);
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switch(setup->request)
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{
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case CDC_SEND_ENCAPSULATED_COMMAND:
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break;
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case CDC_GET_ENCAPSULATED_RESPONSE:
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break;
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case CDC_SET_COMM_FEATURE:
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break;
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case CDC_GET_COMM_FEATURE:
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break;
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case CDC_CLEAR_COMM_FEATURE:
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break;
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case CDC_SET_LINE_CODING:
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_cdc_set_line_coding(device, setup);
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vcom_connected = RT_TRUE;
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break;
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case CDC_GET_LINE_CODING:
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_cdc_get_line_coding(device, setup);
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break;
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case CDC_SET_CONTROL_LINE_STATE:
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rt_device_control((rt_device_t)device->dcd, CONTROL_SEND_STATUS, RT_NULL);
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break;
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case CDC_SEND_BREAK:
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break;
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default:
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rt_kprintf("unknown cdc request\n",setup->request_type);
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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/**
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* This function will run cdc class, it will be called on handle set configuration request.
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*
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* @param device the usb device object.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _class_run(udevice_t device)
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{
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RT_ASSERT(device != RT_NULL);
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RT_DEBUG_LOG(RT_DEBUG_USB, ("cdc class run\n"));
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dcd_ep_read(device->dcd, ep_out, ep_out->buffer,
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ep_out->ep_desc->wMaxPacketSize);
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return RT_EOK;
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}
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/**
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* This function will stop cdc class, it will be called on handle set configuration request.
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*
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* @param device the usb device object.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _class_stop(udevice_t device)
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{
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RT_ASSERT(device != RT_NULL);
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RT_DEBUG_LOG(RT_DEBUG_USB, ("cdc class stop\n"));
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return RT_EOK;
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}
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/**
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* This function will handle system sof event.
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*
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* @param device the usb device object.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _class_sof_handler(udevice_t device)
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{
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rt_uint32_t level;
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rt_size_t size;
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static rt_uint32_t frame_count = 0;
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if(vcom_connected != RT_TRUE) return -RT_ERROR;
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if (frame_count ++ == 5)
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{
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rt_size_t mps = ep_in->ep_desc->wMaxPacketSize;
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/* reset the frame counter */
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frame_count = 0;
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size = RT_RINGBUFFER_SIZE(&tx_ringbuffer);
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if(size == 0) return -RT_EFULL;
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size = size > mps ? mps : size;
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level = rt_hw_interrupt_disable();
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rt_ringbuffer_get(&tx_ringbuffer, ep_in->buffer, size);
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rt_hw_interrupt_enable(level);
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/* send data to host */
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dcd_ep_write(device->dcd, ep_in, ep_in->buffer, size);
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}
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return RT_EOK;
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}
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static struct uclass_ops ops =
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{
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_class_run,
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_class_stop,
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_class_sof_handler,
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};
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/**
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* This function will configure cdc descriptor.
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*
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* @param comm the communication interface number.
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* @param data the data interface number.
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*
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* @return RT_EOK on successful.
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*/
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static rt_err_t _cdc_descriptor_config(rt_uint8_t comm, rt_uint8_t data)
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{
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comm_desc.call_mgmt_desc.data_interface = data;
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comm_desc.union_desc.master_interface = comm;
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comm_desc.union_desc.slave_interface0 = data;
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#ifdef RT_USB_DEVICE_COMPOSITE
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iad_desc.bFirstInterface = comm;
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#endif
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return RT_EOK;
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}
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/**
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* This function will create a cdc class instance.
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*
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* @param device the usb device object.
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*
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* @return RT_EOK on successful.
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*/
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uclass_t rt_usbd_class_cdc_create(udevice_t device)
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{
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uintf_t intf_comm, intf_data;
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ualtsetting_t comm_setting, data_setting;
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/* parameter check */
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RT_ASSERT(device != RT_NULL);
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/* create a cdc class */
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cdc = rt_usbd_class_create(device, &dev_desc, &ops);
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/* create a cdc communication interface and a cdc data interface */
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intf_comm = rt_usbd_interface_create(device, _interface_handler);
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intf_data = rt_usbd_interface_create(device, _interface_handler);
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/* create a communication alternate setting and a data alternate setting */
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comm_setting = rt_usbd_altsetting_create(&comm_desc.intf_desc,
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sizeof(struct ucdc_comm_descriptor));
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data_setting = rt_usbd_altsetting_create(&data_desc.intf_desc,
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sizeof(struct ucdc_data_descriptor));
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/* configure the cdc interface descriptor */
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_cdc_descriptor_config(intf_comm->intf_num, intf_data->intf_num);
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/* create a bulk in and a bulk endpoint */
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ep_out = rt_usbd_endpoint_create(&data_desc.ep_out_desc, _ep_out_handler);
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ep_in = rt_usbd_endpoint_create(&data_desc.ep_in_desc, _ep_in_handler);
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/* add the bulk out and bulk in endpoints to the data alternate setting */
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rt_usbd_altsetting_add_endpoint(data_setting, ep_in);
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rt_usbd_altsetting_add_endpoint(data_setting, ep_out);
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/* add the data alternate setting to the data interface
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then set default setting of the interface */
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rt_usbd_interface_add_altsetting(intf_data, data_setting);
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rt_usbd_set_altsetting(intf_data, 0);
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/* add the cdc data interface to cdc class */
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rt_usbd_class_add_interface(cdc, intf_data);
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/* create a command endpoint */
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ep_cmd = rt_usbd_endpoint_create(&comm_desc.ep_desc, _ep_cmd_handler);
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/* add the command endpoint to the cdc communication interface */
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rt_usbd_altsetting_add_endpoint(comm_setting, ep_cmd);
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/* add the communication alternate setting to the communication interface,
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then set default setting of the interface */
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rt_usbd_interface_add_altsetting(intf_comm, comm_setting);
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rt_usbd_set_altsetting(intf_comm, 0);
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/* add the communication interface to the cdc class */
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rt_usbd_class_add_interface(cdc, intf_comm);
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#ifdef RT_USB_DEVICE_COMPOSITE
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rt_usbd_class_set_iad(cdc, &iad_desc);
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#endif
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return cdc;
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}
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/**
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* UART device in RT-Thread
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*/
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static rt_err_t _vcom_configure(struct rt_serial_device *serial,
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struct serial_configure *cfg)
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{
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return RT_EOK;
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}
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static rt_err_t _vcom_control(struct rt_serial_device *serial,
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int cmd, void *arg)
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{
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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break;
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}
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return RT_EOK;
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}
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static int _vcom_putc(struct rt_serial_device *serial, char c)
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{
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rt_uint32_t level;
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if (vcom_connected != RT_TRUE) return 0;
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level = rt_hw_interrupt_disable();
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if (RT_RINGBUFFER_EMPTY(&tx_ringbuffer))
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{
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rt_ringbuffer_putchar(&tx_ringbuffer, c);
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}
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rt_hw_interrupt_enable(level);
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return 1;
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}
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static int _vcom_getc(struct rt_serial_device *serial)
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{
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int result;
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rt_uint8_t ch;
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rt_uint32_t level;
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result = -1;
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level = rt_hw_interrupt_disable();
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if (RT_RINGBUFFER_SIZE(&rx_ringbuffer))
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{
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rt_ringbuffer_getchar(&rx_ringbuffer, &ch);
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result = ch;
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}
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rt_hw_interrupt_enable(level);
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return result;
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}
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static const struct rt_uart_ops usb_vcom_ops =
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{
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_vcom_configure,
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_vcom_control,
|
|
_vcom_putc,
|
|
_vcom_getc,
|
|
};
|
|
|
|
void rt_usb_vcom_init(void)
|
|
{
|
|
struct serial_configure config;
|
|
|
|
/* initialize ring buffer */
|
|
rt_ringbuffer_init(&rx_ringbuffer, rx_pool, CDC_RX_BUFSIZE);
|
|
rt_ringbuffer_init(&tx_ringbuffer, tx_pool, CDC_TX_BUFSIZE);
|
|
|
|
config.baud_rate = BAUD_RATE_115200;
|
|
config.bit_order = BIT_ORDER_LSB;
|
|
config.data_bits = DATA_BITS_8;
|
|
config.parity = PARITY_NONE;
|
|
config.stop_bits = STOP_BITS_1;
|
|
config.invert = NRZ_NORMAL;
|
|
|
|
vcom_serial.ops = &usb_vcom_ops;
|
|
vcom_serial.int_rx = &vcom_int_rx;
|
|
vcom_serial.config = config;
|
|
|
|
/* register vcom device */
|
|
rt_hw_serial_register(&vcom_serial, "vcom",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
|
|
RT_NULL);
|
|
}
|
|
|
|
#endif
|
|
|